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Bass electrical noise problem

  • 30-01-2012 1:13pm
    #1
    Buddhapadge
    Registered Users, Registered Users 2 Posts: 237 ✭✭


    Hi folks,
    I have a problem with electrical noise through my amp. I play a Lakland through a PJB Briefcase. The bass is perfectly quiet when I play in other places and through other amps, and the amp is perfectly quiet until I plug it into the bass. When I point the bass in certain directions, the noise dies down completely. I'm not a knowledgeable guy with electrical terms, but I've included a recording here of what I'm dealing with. Any thoughts on what I could do to stop the noise?

    http://soundcloud.com/patrickkiernan/electrical-noise-problem


Comments

  • #2
    zafo
    Registered Users, Registered Users 2 Posts: 276 ✭✭zafo


    Maybe some kind of feedback issue. Just to clarify; you're saying it doesn't happen with other basses plugged into this amp?


  • #3
    eoin5
    Registered Users, Registered Users 2 Posts: 2,141 ✭✭✭eoin5


    Doesn't sound like there's anything much wrong with either, probably just picking up some noise from the lights or your phone. What kind of pickups are on the bass?


  • #4
    Buddhapadge
    Registered Users, Registered Users 2 Posts: 237 ✭✭Buddhapadge


    zafo wrote: »
    Maybe some kind of feedback issue. Just to clarify; you're saying it doesn't happen with other basses plugged into this amp?

    It happens with every instrument, even basses with active EMGs. The bass on the recording has Bartolini humbuckers. The lights were all off, and my phone wasn't nearby. I've moved the amp around the house and everything, but the noise remains.


  • #5
    reniwren
    Registered Users, Registered Users 2 Posts: 349 ✭✭reniwren


    Are you facing the amp when the noise appears?
    and what distance are you from the amp?


  • #6
    Buddhapadge
    Registered Users, Registered Users 2 Posts: 237 ✭✭Buddhapadge


    reniwren wrote: »
    Are you facing the amp when the noise appears?
    and what distance are you from the amp?

    I'm a few feet from the amp in that recording, and I wasn't facing directly into it when the noise was there.


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  • #7
    eoin5
    Registered Users, Registered Users 2 Posts: 2,141 ✭✭✭eoin5


    So it happens with multiple basses, points to the amp so..

    The possibilities are either there's a problem with the amp or its got to do with the design of it. From listening I'd guess the latter. Its got two 5" drivers, that's got to be pushing a few frequencies standard amps don't.

    The ideal way of testing is trying out another one. If you got it in a shop hopefully they'd have another one to give a go.


  • #8
    reniwren
    Registered Users, Registered Users 2 Posts: 349 ✭✭reniwren


    It is the line frequency from the power transformer in your amp being magnetically induced into your pickups. All magnetic pickups will do this to some extent. Single coils, are the worst but humbuckers also do this.It happens with all my basses when I face my amps. Just stand a little further away from your amp.


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